Description
Specifies the syntax the SNC database interface uses to obtain the identity value of a new row in a database table.
When a DataWindow update request inserts a new row into a Microsoft SQL Server table that contains an IDENTITY column, the DataWindow engine calls the SNC interface to obtain the identity value of the newly inserted row. The Identity database parameter allows you to define how this request is implemented.
Applies to
SNC SQL Native Client for Microsoft SQL Server
MSOLEDBSQL Microsoft OLE DB Driver for SQL Server
ADO.NET for SQL Server
Syntax
Identity=value
|
Parameter |
Description |
|---|---|
|
value |
A value specifying the syntax for obtaining the identity value of a newly inserted row. Values are:
|
Default value
Identity='@@IDENTITY'
Usage
By default, the SNC interface issues SELECT @@identity to obtain the IDENTITY column value of the newly inserted row. It returns the last IDENTITY value produced on a connection, regardless of the table that produced the value, and regardless of the scope of the statement that produced the value.
SELECT IDENT_CURRENT('tablename') returns the last IDENTITY value produced in a table, regardless of the connection that created the value, and regardless of the scope of the statement that produced the value.
SELECT SCOPE_IDENTITY() returns the last IDENTITY value produced on a table and by a statement in the same scope, regardless of the table that produced the value.
Because Identity is a dynamic database parameter, it can be set and reset at any time during an application.
Examples
To specify the syntax for obtaining the identity value of a newly inserted row:
-
Database profile
Select SCOPE_IDENTITY() from the DataWindow Identity Value drop-down list on the Syntax page in the Database Profile Setup dialog box.
-
Application
Type the following in code:
SQLCA.DBParm="Identity='SCOPE_IDENTITY()'"
